It would have to be done in either the Admin Panel as the LK is written or by going into DB and directly editing them there.
You can't adjust the language file (in this case langs/lang-it.php ) because as soon as you do it via a code editor your fine until the next time you compile the lanugage on that file. Then the DB will just overwrite.
In this instance, I had to open langs/lang-it.php and do a search for /' and replace all occurrances via Admin-> Settings -> Language Settings see more and doing a search for each key that came up. We found 376 occurances and yes, it took hours to fix them all.
You can't adjust the language file (in this case langs/lang-it.php ) because as soon as you do it via a code editor your fine until the next time you compile the lanugage on that file. Then the DB will just overwrite.
In this instance, I had to open langs/lang-it.php and do a search for /' and replace all occurrances via Admin-> Settings -> Language Settings see more